Neptronic WP440L Series Manual

Series L Standard System Manual w 150S option - 220414 - Josiah.docx
Reverse Osmosis Systems
WP440L Series
Installation Instructions and User Manual
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I-ROC150S
Controller

WP440L-Series Reverse Osmosis System
Installation Instructions and User Manual
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Foreword
Neptronic Company Overview
Founded in 1976, we’re a private corporation that designs, manufactures and distributes products for the HVAC industry.
Our product line includes intelligent controllers, electronic actuators, actuated valves, humidifiers and electric heaters.
Our products are designed and manufactured by over 250 dedicated employees in our 7,500 m2 (80,000 ft2) state-of-the-
art facility located in Montreal, Canada. Using a vertical integration model, our entire manufacturing chain is under one roof,
from software and hardware development to SMT circuit board assembly, to sheet metal fabrication, to product testing,
ensuring that our products are engineered to last.
We currently hold several national and international patents and with our continued commitment to research and
development, we provide innovative products and technologies for the ever-evolving challenges of the HVAC industry.
Exporting over 70% of our sales, we have an exclusive distribution network around the globe that provides comprehensive
solutions to our worldwide customers.
About the Manual
These installation and operation instructions have been developed to facilitate the installation of the Reverse Osmosis for
the L-Series humidifiers.
•The strict application of these instructions will ensure the conformity of your installation and operation as per
the manufacturer's recommendations.
•The application of these instructions is one of the conditions for the application of the warranty.
•The application of these instructions does not ensure, at any time conformity to procedures, regulation or local
codes, regarding electric installation and connection to local water supply.
This product has been declared to conform to the applicable Canadian and American safety standards and directives and
bear the ETL (c) & (us) mark. The Certificate for ETL is available, upon request to the manufacturer.
2022©: All rights reserved. This document cannot be reproduced totally or partially by any means whether, electronic,
mechanical, photocopy, recording or other, without prior written authorization of Neptronic.
Electricity
All work concerned with electrical installation MUST only be performed by skilled and qualified
technical personnel, such as an electrician or a technician with appropriate training. The customer is
always responsible for ensuring the suitability of the technical personnel.
Please observe the local regulations concerning the provision of electrical installations.
Correct Use
Neptronic systems and its products are designed only for humidification use. Any other application is not considered
appropriate for the intended purpose. The manufacturer cannot be made liable for any damage resulting from incorrect use.
General Warranty
This product is subject to the terms and conditions described at http://www.neptronic.com/Sales-Conditions.aspx.

WP440L-Series Reverse Osmosis System
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Contents
RO System Design Specifications .......................................................................................................................................... 5
Design Assumptions ............................................................................................................................................................ 6
Design Notes ....................................................................................................................................................................... 6
General Information and Safety .............................................................................................................................................. 6
System Installation .................................................................................................................................................................. 7
Plumbing ................................................................................................................................................................................. 8
Feed Water Connection:...................................................................................................................................................... 8
Concentrate/Reject Connection........................................................................................................................................... 9
Permeate/Product Water Connection.................................................................................................................................. 9
Product Water Storage Tank Level Float Installation............................................................................................................ 10
Electrical Connections........................................................................................................................................................... 11
I-ROC150S RO System Controller Installation and Setup.................................................................................................... 12
Introduction ........................................................................................................................................................................ 12
Specifications..................................................................................................................................................................... 12
Relay Outputs .................................................................................................................................................................... 12
Power Wiring ..................................................................................................................................................................... 12
I/O Expander Board........................................................................................................................................................... 14
System Operation ................................................................................................................................................................. 20
I-ROC150S RO System Controller Operation ................................................................................................................... 20
General Operation ......................................................................................................................................................... 20
Front Panel Controls and Indicator ................................................................................................................................ 20
Operating Status Messages .............................................................................................................................................. 21
TDS / Conductivity ......................................................................................................................................................... 21
Operating Hours............................................................................................................................................................. 21
Temperature .................................................................................................................................................................. 21
Warning Messages ........................................................................................................................................................ 21
Tank Full Operation ....................................................................................................................................................... 21
Tank Full Restart............................................................................................................................................................ 22
Tank Full Override ......................................................................................................................................................... 22
Pressure Fault................................................................................................................................................................ 22
Auto Reset ..................................................................................................................................................................... 22
Alarm Silence ................................................................................................................................................................. 22
Pretreat .......................................................................................................................................................................... 22
Membrane Flush................................................................................................................................................................ 23
Flush Mode .................................................................................................................................................................... 23
High TDS / Conductivity Warning/Alarm........................................................................................................................ 23
Operating Hours Exceeded............................................................................................................................................ 23

WP440L-Series Reverse Osmosis System
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I/O Expander .................................................................................................................................................................. 24
Auxiliary Output.............................................................................................................................................................. 24
Tank Low........................................................................................................................................................................ 24
Boost Pump Output........................................................................................................................................................ 24
Divert Output .................................................................................................................................................................. 24
Alarm Output.................................................................................................................................................................. 24
ADJUSTMENTS ................................................................................................................................................................ 24
TDS / Conductivity Calibration....................................................................................................................................... 24
Display Adjustment ........................................................................................................................................................ 24
Initial System Start-Up....................................................................................................................................................... 25
Operating DO’s & DON’Ts................................................................................................................................................. 26
System Automation ........................................................................................................................................................... 26
System Shut-Down............................................................................................................................................................ 27
System Monitoring and Record Keeping ........................................................................................................................... 27
Data Log ............................................................................................................................................................................ 28
Troubleshooting .................................................................................................................................................................... 30
General Troubleshooting ................................................................................................................................................... 30
System Controller Troubleshooting – I-ROC150S ............................................................................................................ 31
Pump Troubleshooting (for Systems with Procon Pumps) ............................................................................................ 32
System Maintenance............................................................................................................................................................. 34
Sediment Pre-Filter Cartridge............................................................................................................................................ 34
When to Change Sediment Prefilter Cartridge .............................................................................................................. 34
Changing Cartridge Filters ............................................................................................................................................. 34
Membrane Cleaning .......................................................................................................................................................... 34
When to Clean Membranes ........................................................................................................................................... 34
Common Foulants and Their Associated Symptoms .................................................................................................... 35
Cleaning Sequence........................................................................................................................................................ 35
Cleaning Procedure Using Membrane Cleaning Cartridges.......................................................................................... 35
Membrane Replacement ................................................................................................................................................... 35
Low Pressure Switch Adjustment ...................................................................................................................................... 36
Pump Maintenance (for systems with Sta-Rite Pump)...................................................................................................... 37
Shut Down and Storage ........................................................................................................................................................ 38
Membrane Storage (outside of RO system)...................................................................................................................... 38
RO System Storage and Biocidal Protection..................................................................................................................... 38
Disinfection and Sterilization of RO Elements................................................................................................................... 39
Component Identification- Standard Features up to WP4406L........................................................................................ 39
Component Identification- Standard Features for WP440XL ............................................................................................ 43
General Arrangement of Systems with Procon Pump....................................................................................................... 44
General Arrangement of Systems with Sta-Rite Pump ..................................................................................................... 44
Parts & Instrumentation Drawing (P&ID) ........................................................................................................................... 45

WP440L-Series Reverse Osmosis System
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Replacement Parts and Consumables ................................................................................................................................. 46
Product Warranty .................................................................................................................................................................... 1
RO System Design Specifications
Table 1 - RO System Design Specifications
Model
Design Conditions
Limits*
Line Sizes (in.)
Pump model and HP
Permeate Flow Conc.
Flow to
Drain
(GPM)
Design
Recycle
Flow
(GPM)
Design
Recovery
(%)
Max.
Recovery*
(%)
Max.
Recycle
Flow*
(GPM)
Inlet Perm. Conc.
Design
Pump
Flow
(GPM)
Pump Model No. Motor
Model
Motor
HP
Full Load
Amps
(FLA)@
indicated
voltage
GPD GPM
WP4401L-116
1,800
1.2
4.3
0
25
60
3.4
0.75
0.5
0.5
5.5
114E330F11XX
P-MG573
1
16
WP4401L-216
1,800
1.2
4.3
0
25
60
3.4
0.75
0.5
0.5
5.5
114E330F11XX
P-MG573
1
8
WP4402L-116
3,000
2.2
2.6
0.8
45
60
1.8
0.75
0.5
0.5
5.5
114E330F11XX
P-MG573
1
16
WP4402L-216
3,000
2.2
2.6
0.8
45
60
1.8
0.75
0.5
0.5
5.5
114E330F11XX
P-MG573
1
8
WP4403L-216
5,200
3.5
3.5
1.0
50
60
2.2
0.75
0.5
0.5
8
HPS20H
W/PUMP
3
17
WP4403L-236
5,200
3.5
3.5
1.0
50
60
2.2
0.75
0.5
0.5
8
HPS20H3
W/PUMP
3
10
WP4403L-436
5,200
3.5
3.5
1.0
50
60
2.2
0.75
0.5
0.5
8
HPS20H3
W/PUMP
3
5
WP4404L-216
6,500
4.5
3.0
1.0
55
60
2.5
0.75
0.5
0.5
9
HPS20H
W/PUMP
3
17
WP4404L-236
6,500
4.5
3.0
1.0
55
60
2.5
0.75
0.5
0.5
9
HPS20H3
W/PUMP
3
10
WP4404L-436
6,500
4.5
3.0
1.0
55
60
2.5
0.75
0.5
0.5
9
HPS20H3
W/PUMP
3
5
WP4405L-216
8,500
5.5
4.0
1.5
60
75
3.5
0.75
0.5
0.5
11
HPS20H
W/PUMP
3
17
WP4405L-236
8,500
5.5
4.0
1.5
60
75
3.5
0.75
0.5
0.5
11
HPS20H3
W/PUMP
3
10
WP4405L-436
8,500
5.5
4.0
1.5
60
75
3.5
0.75
0.5
0.5
11
HPS20H3
W/PUMP
3
5
WP4406L-216
10,000
6.6
4.0
1.5
60
75
3.5
0.75
0.5
0.5
12
HPS20H
W/PUMP
3
17
WP4406L-236
10,000
6.6
4.0
1.5
60
75
3.5
0.75
0.5
0.5
12
HPS20H3
W/PUMP
3
10
WP4406L-436
10,000
6.6
4.0
1.5
60
75
3.5
0.75
0.5
0.5
12
HPS20H3
W/PUMP
3
5
WP440XL-216
17,300
12
4.5
2.0
65
75
3.0
0.75
0.75
0.5
17.5
HPS20H
W/PUMP
3
17
WP440XL-236
17,300
12
4.5
2.0
65
75
3.0
0.75
0.75
0.5
17.5
HPS20H3
W/PUMP
3
10
WP440XL-436
17,300
12
4.5
2.0
65
75
3.0
0.75
0.75
0.5
17.5
HPS20H3
W/PUMP
3
5
WP44012-216
19,000
13
4.5
2.0
65
75
3.0
0.75
0.75
0.5
18.5
HPS20H3-D1MS3
W/PUMP
3
10
WP44012-236
19,000
13
4.5
2.0
65
75
3.0
0.75
0.75
0.5
18.5
HPS20H3
W/PUMP
3
10
WP44012-436
19,000
13
4.5
2.0
65
75
3.0
0.75
0.75
0.5
18.5
HPS20H3
W/PUMP
3
5
*Water must be softened or have antiscalant injection. Check with factory to make sure this recovery will not cause any scaling problems
with your feedwater.
• 4” diameter model no. M-T4040AHF. Vessel model: PV4040SSAW-316

WP440L-Series Reverse Osmosis System
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Design Assumptions
• Systems rated at: 77°F (25°C) using 1000 PPM sodium chloride solution operating at 200 psi pressure.
• Minimum feed pressure to RO System: 40 PSI. System capacity changes significantly with water temperature. For
higher TDS a water analysis must be supplied and could result in modifications to the system.
• Chlorine must be removed if present in feed water prior to RO with a carbon filter or with chemical injection.
• Water must be pretreated with a softener or antiscalant injection to avoid scaling the membranes.
• Feed water turbidity: Less than 1 NTU; Feed water silt density index (SDI): 3 maximum. If exceeded, pretreatment with
media filter recommended. All pretreatment equipment and SDI test kits are available from Applied Membranes.
• Capacity Basis: 24 hrs/day.
Design Notes
1. Pump flow/Feed flow: The pump has been designed to include recycle flow (if any) coming back to the pump inlet
from the concentrate stream based on desired recovery. The sum of permeate flow, concentrate flow and recycle flow
(if any) will equal the pump design flow.
2. Permeate flow: Indicates design flow rate from RO membranes as product water for use.
3. Concentrate flow: Water flowing to the drain. Concentrate flow is critical for proper system operation. For proper
concentrate flows, refer to the system design information on pages 3-4.
4. Recycle flow: Flow stream that returns from the concentrate line back to the pump intake, rather than to the drain.
Note 1: Permeate flow should not exceed recommended flow.
Note 2: System pressure is a variable. It is important to adjust the pressure to get the correct
permeate and concentrate flows. The exact value of the pressure is not important.
Note 3: Permeate flow will increase at higher temperature.
General Information and Safety
DISCLAIMER: The information contained in this document is subject to change without notice. Applied Membranes,
Inc. shall not be liable for technical or editorial omissions made herein; nor for incidental or consequential damages
resulting from the furnishing, performance, or use of this material.
POWER CONNECTIONS:
•Use proper wiring and connection methods to satisfy local electrical codes.
•Connect this unit to a properly grounded connection in accordance with the National Electrical Code.
•Ensure that the ground wire or ground prong is connected to the power plug.
•Do not the use extension cord or an adapter without proper consideration.
WARNING: Risk of electric shock. Disconnect the appliance from electric supply before
commencing servicing.
WARNING: Do not make any alteration or modification in the wiring or plumbing of the system.
This can result in damage to the system and cause injury to operators or users.
WARNING: Flush the system for at least 30 minutes before use to remove all chemicals present.

WP440L-Series Reverse Osmosis System
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CAUTION: Chlorine will damage the membranes. Chlorine must be removed from the feed
stream before entering the system.
CAUTION: Never let the system freeze. Freezing can damage the membrane and plumbing.
System Installation
Location
Select a location for the RO system with adequate clearance from walls and other equipment to enable servicing of the
pump / motor assemblies, membranes, cartridge prefilter and other serviceable components. Allow at least four (4) feet of
clearance at the top end of the membrane housings for future membrane replacement.
The unit must be located near a drain able to accommodate up to 10 GPM. This is in addition to any other equipment
sharing the drain.
A grounded power supply of the appropriate voltage matching your system model’s voltage with 15A fuse protection and a
local disconnect switch is required.
CAUTION: The system must not be located near any corrosive chemicals, or in an area where
the temperature may exceed 113°F (45°C).
WARNING: The system must be properly grounded to avoid injury from electrical shock.

WP440L-Series Reverse Osmosis System
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Plumbing
Refer to the P&ID on page 35 for further information.
Plumbing Installation must conform to Local and National Codes.
Any installation work must be carried out by suitably qualified personnel.
CAUTION: This unit produces high quality water which can cause corrosion or leaching of
the plumbing following the system.
Use only plumbing components of inert material that are compatible with the application.
Copper plumbing cannot be used.
Plumbing materials can significantly contribute to the contamination of the water. Care must be exercised over the choice
of thread sealants. Teflon tape is suitable for all threaded connections in this system. Pipe dope can leach objectionable
impurities into the water and must be avoided.
Feed Water Connection
Connect the raw water supply to the inlet of the solenoid valve (P.O.C), observing the following:
•The line size shall be 3/4” or larger to minimize pressure loss.
•A manual valve may be installed on this line to shut off the water supply if it will ever be needed. Be sure that this
valve in no way restricts the water flow when it is fully open.
•Water supply minimum pressure 40 P.S.I., maximum pressure 100 P.S.I. A pressure regulator may be required.
Illustration 1 - Side View of the System

WP440L-Series Reverse Osmosis System
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Illustration 2 - Front View of the System
Concentrate/Reject Connection
Connect a line to the concentrate connection point on the skid (refer to illustration 2). The drain must have a minimum
capacity which meets or exceeds the concentrate output of your system. Check the Design Specification (pages 3-4) for
your model.
Permeate/Product Water Connection
Connect the product water line to the product connection point on the system (refer to illustration 2). Run this line to your
storage tank or other downstream equipment, observing the following:
•Run this line in such a manner as to minimize static head pressure in the product line.
•A check valve is recommended to prevent back flow to the RO membranes. This check valve should be installed
on the output of the product connection point.
•The product line should have no restrictions to the product flow.
•Connect the product line to a bulkhead fitting at the top of the storage tank.
CAUTION: RO Membranes will fail immediately if the product water is allowed to flow
backward into the elements. Use a check valve and ensure that there are no restrictions on
the product flow to prevent backflow.
CAUTION: The highest point of the tubing should not be higher than four feet above the top
of the RO modules, or the elements may be damaged.

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Product Water Storage Tank Level Float Installation
Note: Please read all steps of installation instructions before beginning.
Note: If using a repressurization pump, a third float should be used to turn the pump off when the tank is
empty.
1. Remove the bulkhead nut from the bulkhead fitting and place the bulkhead through the opening in the tank from
the outside, making sure the bulkhead gasket is on the outside of the tank. Loosely connect the bulkhead nut and
do not tighten it.
2. Position the float tree assembly on the inside of the tank and pull the float wires through the bulkhead fitting.
Connect the float assembly tee to the bulkhead fitting by turning the bulkhead fitting from the outside of the tank.
Tighten the bulkhead nut.
CAUTION: Do not tighten by turning the float assembly inside the tank, float damage can occur.
Tighten only by turning the bulkhead fitting from the outside of the tank.
3. Position the electrical conduit elbow on the outside of the tank and pull the float wires into the conduit elbow.
Thread onto the bulkhead fitting.
4. Install SO cord (supplied by customer) through the strain relief fitting. Make sure enough wire is run into the
conduit fitting.
5. Connect the wires from the SO cord to the float switch wires with customer supplied wire nuts; refer illustration 3
and replace cover.
Note: It is recommended to test the wiring by placing an OHM meter on the connections testing for
possible short or ground. All electrical connections shall be in accordance with the NESC guidelines and
as dictated by local authorities holding proper jurisdiction for local/state and or by U.B.C., and U.M.C.
guidelines for all mechanical means.
6. Run the SO cord to the RO control panel (detailed instructions in the Electrical Connections on page 11).
Illustration 3 - Float Tree Assembly

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Electrical Connections
WARNING: All electrical connections should be done by a qualified electrician and are to be in
accordance with state and local codes.
Note: For Full Load Amps and Fuses Information, please see system design specifications on pages 5-
6. Provide circuit breaker protection as outlined in this chart.
Table 2 - AMI Voltage Suffix Index
Voltage WP4401L WP4402L WP4403L WP4404L WP4405L WP4406L WP440XL
-216 = 220-240V/1PH/60Hz •••••••
-236 = 240V/3PH/60Hz •••••
-436 = 460V/3PH/60Hz •••••
Other Voltages: No power cord is included. Electrical connections must be performed by a qualified electrician.

WP440L-Series Reverse Osmosis System
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I-ROC150S RO Controller Installation and Setup
Introduction
The Applied Membranes Inc. Series 150 controller is a state-of-the-art control system for commercial and industrial
reverse osmosis systems. The Series 150 is a microprocessor-controlled system that can monitor pressure and level
switches. A TDS monitor/controller with programmable set-points is an integral part of the Series 150. The Series 150
displays system status and sensor and switch input status using an easy to ready backlit LED display.
Specifications
•Power: 120/240 VAC -15+10%, 50/60Hz, 25Watts.
•Environment: 22°F to 140°F, 0-95% RH, non-condensing.
•Enclosure: 10" X 8" X 6”.
•Display: 4-line X 20-character, alphanumeric backlit LCD.
•Front Panel: Overlay with LCD window, alarm lamp, 7 key membrane switches.
•Switch Inputs, Dry Contact: Pressure fault, Pre-treat lockout, Tank high, tank low.
•I/O Expander board: Auxiliary/divert/boost relay – 120/240VAC, 1HP, divert/alarm relay – 120/240VAC, 5A, tank low
switch input, dry contact.
•Cell: TDS cell with digital display, range: 0-1000 PPM feed, 0-50 PPM permeate. Wetted parts ABS and 316SS, 3/4"
NPT, 300 PSI max.
Relay Outputs
•RO pump relay: 120/240VAC, 1HP
•Inlet valve relay: 120/240VAC, 5A
•Flush valve relay: 120/240VAC, 5A
Note: Relays supply the same output voltage as the board power (120 or 240 VAC).
Power Wiring
Refer to illustration 4 and the following drawings for terminal strip and jumper locations. Before applying power to the unit.
AC power for the unit is connected to terminal strip P1. Connect the ground wire of the AC power to the terminal
labeled GND. For AC power with a neutral and hot wire, the hot wire connects to L1 and the neutral wire connects to
L2. For AC power with 2 hot wires, either wire can connect to L1 and L2.
The Series 150 supplies relay outputs to control the RO pump and solenoid valves.
Note: The relays output the same voltage as the AC power to the board.
Pump and Valve Relay Outputs
RO Pump Wiring

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The RO pump connects to L1 and L2 RO pump terminals of P1. This output can operate 120/240VAC motors up to 1HP
directly. For motors larger than 1HP or for 3 phase motors, this output is used to operate a contactor.
The inlet and flush valves must operate at the same voltage as supplied to the board. These outputs can supply 5A
maximum and are not designed to operate pump motors directly. If these outputs are to be used to operate a boost or
flush pump, the output should be used to operate a motor contactor. The inlet valve connects to L1 and L2 inlet terminals.
The flush valve connects to L1 and L2 flush terminals of P1.
The cell is connected with 5 wires to terminal strip P10. Each colored wire will be connected to the terminal labeled with
the same color.
CAUTION: Applying voltage to these terminals will damage the controller.
Switch inputs are connected to P9. The connections for these inputs are not polarity sensitive and can be connected to
either terminal. The switch inputs should be dry contact closures only. The switches can be either normally open or normally
closed in any combination. The switch connected to an input that is configured as normally open must be open for the unit
to run.
The switch connected to an input that is configured as normally closed must be closed for the unit to run. The Switch Select
Set-point allows each input to be configured as normally open or normally closed. The Switch Select Set-point is defaulted
to 0 which programs all inputs as normally open. This means that all switch inputs must be open for the unit to run.
A feed pressure switch is connected to the pressure fault input of P9. If a high pump pressure shut down is required, a
high-pressure switch can be connected to this input.
If both low feed pressure and high pump pressure shut down are required, both switches can be connected to this input.
Both switches must be either normally open or normally closed to operate properly.
In systems with pretreatment, a pretreat lockout switch can be connected to the pretreat input of P9. This switch should
operate when the pretreatment device is out of service.
Note: The output from the pre-treatment device must be a dry contact and must not supply voltage.
Tank Full Switch
In systems with a single tank level switch for controlling the RO pump, the level switch connects to the tank full high input
of P9. If dual level switches are used for controlling the RO pump, the upper-level switch connects to the tank full high input
of P9 and the lower-level switch connects to the tank full low input of P9.
Inlet and Flush Valve Wiring
TDS Cell Installation and Wiring
Switch Inputs
Pressure Fault Switch
Pretreat Switch

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I/O Expander Board
With the I/O expansion board 2 additional relay outputs and 1 additional switch input are provided. Refer to figure 4 for the
location of terminal strips, jumpers and wiring for this board. AC power for the relays is connected to the L1 and L2 power
terminals of P1. Relay 1 is connected to this power input and will supply the same voltage. This relay is rated for
120/240VAC at 1HP maximum. Relay 1 can be configured to supply a dry contact by connecting a jumper wire between
the L1 and L2 power terminals of P1.
Jumpers J1-J4 are used to select the relay 2 output type. To output voltage, a wire jumper is installed between J1 and J4
and a second wire jumper is installed between J2 and J3. For a contact closure output, a single wire jumper is installed
between J3 and J4. The 2 relay outputs can be selected to operate as an auxiliary pump output, a divert output or an
alarm output by programming the Expander Mode Set-point.
Note: If Relay 1 is configured as a dry contact, Relay 2 must be configured as a dry contact also.
If Relay 1 is configured to supply voltage, Relay 2 can be selected to supply voltage, 120/240, 5A maximum,
or as a dry contact output.
Table 3- Values to Program the Relay Outputs
Expander Mode
RELAY 1
RELAY 2
0
Auxiliary Pump
Divert
1
Auxiliary Pump
Alarm
2
Divert
Alarm
3
Boost
Divert
4
Boost
Alarm
If the Expander Mode Set-point is programmed to 0 or 1, relay 1 operates as an auxiliary pump output. This output is
energized when the tank low input is not active. This output will supply power, or a contact closure determined by the
connections L1 and L2 of the terminal strip P1.
If the Expander Mode Set-point is programmed to 3 or 4, relay 1 operates as a boost pump output. This output is
energized when the inlet solenoid output is active. This output will supply power, or a contact closure determined by the
connections L1 and L2 of the terminal strip P1.
If the Expander Mode Set-point is programmed to 0 or 3, relay 2 operates as a divert relay and will operate whenever the
unit is in the divert mode. This output will supply voltage or provide a contact closure based on the configuration of relay 1
and on the position of jumpers J1-J4.
If the Expander Mode Set-point is programmed to 2, relay 1 operates as a divert relay and will operate whenever the unit
is in the divert mode. This output will supply power, or a contact closure determined by the connections L1 and L2 of the
terminal strip P1.
If the Expander Mode Set-point is programmed to 1, 2 or 4, relay 2 operates as an alarm relay. When an alarm or warning
is active, this relay will supply voltage or provide a contact closure based on the configuration of relay 1 and the position of
jumpers J1-J4.
Auxiliary Pump
Boost Pump
Divert Output
Alarm Output

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A tank low switch input can be connected to the tank low input of P2 on the expander board. This input will provide a tank
low warning on the unit and if the expander is programmed to provide an auxiliary pump output, will provide low tank level
protection for this pump.
Illustration 4 - Printed Circuit Board Interface
Tank Low Switch

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Illustration 5 – Power Wiring Drawing 1

WP440L-Series Reverse Osmosis System
Installation Instructions and User Manual
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Illustration 6 – Power Wiring Drawing 2

WP440L-Series Reverse Osmosis System
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Illustration 7 – Power Wiring Drawing 3

WP440L-Series Reverse Osmosis System
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Illustration 8 – Power Wiring Drawing 4

WP440L-Series Reverse Osmosis System
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System Operation
I-ROC150S RO System Controller Operation
The unit has 2 modes of operation, a standby mode and an operating mode. In the standby mode, the unit is effectively
off. All outputs are turned off and the display shows STANDBY. In the operating mode, the unit operates automatically. All
inputs are monitored, and the outputs are controlled accordingly. Pressing the Power key will toggle the unit from standby
to operate or from operate to standby. If power is removed from the unit, when power is reapplied, the unit will restart in
the mode it was in when power was removed.
Illustration 9 - Front Control Panel
Table 4 - Front Control Panel Description
Feature
Description
Display
Shows status of the system.
Alarm Lamp
Flashes when fault causes an RO system shut-down. ON steady when a set-point is
exceeded that does not cause an RO system shut-down.
Power Key
Places controller in operating or standby mode.
Left Arrow Key
Scrolls through set-points starting with first set-point.
Right Arrow Key
Scrolls through set-points starting with last set-point.
Up Arrow Key
Increases value of set-point.
Down Arrow Key
Decreases value of set-point.
Enter Key
Confirms entry of new set-point value.
Alarm Silence/ Reset Key
Push once for alarm silence and twice to reset the system after a shutdown has
occurred.
General Operation
Front Panel Controls and Indicator